article, aside, blockquote, body, button, code, dd, details, div, dl, dt,
fieldset, figcaption, figure, footer, form, h1, h2, h3, h4, h5, h6, header,
hr, input, legend, li, menu, nav, ol, p, pre, section, td, textarea, th, ul{
    padding: 0;
    margin: 0;
    outline:none;
}
.all-box{
    width: 100vw;
    height: 100vh;
    background-color: silver;
}
.reg-box{
    height: 80vh;
    background-color: saddlebrown;
}
.header{
    width: 500px;
    margin: auto;
}
.header-top{
    background-color: seagreen;
}
.section-box{
    padding: 30px 0;
    background-color: deepskyblue;
}
.sec-top{
    width: 90%;
    margin: auto;
}
.footer{
    height: 20vh;
}















